|Número de publicación||US9416601 B2|
|Tipo de publicación||Concesión|
|Número de solicitud||US 14/056,362|
|Fecha de publicación||16 Ago 2016|
|Fecha de presentación||17 Oct 2013|
|Fecha de prioridad||17 Oct 2013|
|También publicado como||US20150107385|
|Número de publicación||056362, 14056362, US 9416601 B2, US 9416601B2, US-B2-9416601, US9416601 B2, US9416601B2|
|Inventores||Albert Augustus Mullins, Matthew J. Hickl|
|Cesionario original||DrawWorks LLP|
|Exportar cita||BiBTeX, EndNote, RefMan|
|Citas de patentes (17), Citada por (1), Clasificaciones (6), Eventos legales (1)|
|Enlaces externos: USPTO, Cesión de USPTO, Espacenet|
The field of the invention is tools that assemble and deliver tubular strings into a borehole and more particularly top drive driven tools that allow circulation, makeup and movement of the string as it is assembled into the borehole.
In the past manipulation, threading and circulation of casing or tubulars was done with a variety of tools such as fill up and circulation tools that featured a seal to the inside or the outside of the tubular to be able to pump fluid as the tubular string was lowered into the borehole or to initially fill that last segment that was added to the string before running in. Typically the handling of a joint to be added to a string was done with elevators and the threading was accomplished with tongs. Such tools are illustrated in U.S. Pat. Nos. 6,578,632; 5,971,079; 7,028,769; 7,665,515 and 6,173,777.
More recently systems have been developed that employ the top drive for rotation and axial movement of a tubular joint to be made up to an existing string and advanced into the borehole. These are rather complex devices that rely on cam pairs to convert rotation to axial movement of slips that cams the slips radially outwardly or inwardly to grip the inside or the outside of a tubular. They feature opposed cam pairs to allow slip actuation with bi-directional rotation and a lock position in between to allow for release. These designs are highly complex and expensive to produce and present complications that could require significant downtime for maintenance. The design is illustrated in U.S. Pat. Nos. 8,424,939 and 7,909,120.
The present invention enables selective grip and release of a tubular joint to thread a connection and to rotate a string while facilitating release to get the next joint in the string connected. The device may include a lower end seal preferably in the form of a cup seal and slips in a housing that respond to axial movement of an actuating member. The actuating member is connected to a clutched drive that is engaged for power delivery and disengaged with set down weight from the top drive. Drive rotation turns a thread that is engaged to the actuating member to move the actuating member axially in one of two opposed direction for radial extension or retraction of the slip segments. With the slips engaged the string can be rotated while lowered or lifted. With the string supported from the rig floor the top drive can radially allow the slips to retract with rotation. Those skilled in the art will have a better understanding of the present invention from the description of the preferred embodiment and the associated drawings while recognizing that the full scope of the invention is to be found in the appended claims.
A casing running tool is connected to a top drive with a clutch that operates with set down weight against a spring resistive force. Setting down weight with rotation in a first direction raises an actuation member that pushes the slips out radially. The weight of the string then keeps the slips in position so that the string can be picked up and the rig floor slips removed followed by lowering the string while circulating and rotating. With slips set inside the joint and the string hanging free rotating the top drive rotates the string as the string is lowered. With slips again supporting the string on the rig floor the top drive can be rotated in an opposed direction with weight set down to back off the slips and to remove it from the top joint.
To make the actuator 10 move axially, weight is set down with the top drive TD pushing the ring 50 against the top 52 of the driving nut 1, as shown in
It should be noted that spring 5 is optional and the same result can be obtained by moving a precise distance in either or both opposed directions with the top drive to get the desired engagement that allows slip extension or tubular rotation with the weight of the string hanging off the top drive as well as the release of the slips from the string when needed.
In order to release from the string 14 after filling and circulating through the string 14 as it is advanced into the borehole, slips on the rig floor (not shown) are set to support the string 14 from the ring floor and allow weight to be set down by lowering the top drive TD so that the
Those skilled in the art will appreciate that spring 5 can take different forms such as a sealed volume with compressible gas inside or a stack of Bellville washers for example. The top sub 3 can be a guide for the axial movement of the actuator 10 while conducting flow through the cup seal 12. The rotational lock with balls 9 can be splines or other structures. The design is simple and can be built economically for reliable operation. Setting down weight allows extension or retraction of the slips when accompanied by rotation from the top drive. Without setting down weight and rotating the top drive with the slips extended the tubular supported by the slips turns in tandem with the housing 6,7 and the slips 11 that is non-rotatably attached to it.
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|Patente citante||Fecha de presentación||Fecha de publicación||Solicitante||Título|
|US20160024862 *||28 Jul 2014||28 Ene 2016||Tesco Corporation||System and method for establishing tubular connections|
|Clasificación internacional||E21B19/06, E21B19/07|
|Clasificación cooperativa||Y10T74/18728, E21B19/06, E21B19/07, Y10T74/18056|
|17 Oct 2013||AS||Assignment|
Owner name: DRAWWORKS LP, TEXAS
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MULLINS, ALBERT AUGUSTUS;HICKL, MATTHEW J.;REEL/FRAME:031427/0626
Effective date: 20131017